Some embodiments modify caching server operation to evict cached content based on a deterministic and multifactor modeling of the cached content. The modeling produces eviction scores for the cached items. The eviction scores are derived from two or more factors of age, size, cost, and content type. The eviction scores determine what content is to be evicted based on the two or more factors included in the eviction score derivation. The eviction scores modify caching server eviction operation for specific traffic or content patterns. The eviction scores further modify caching server eviction operation for granular control over an item's lifetime on cache.

In an embodiment of the invention, a method comprises: requesting an update or modification on a control data in at least one flash block in a storage memory; requesting a cache memory; replicating, from the storage memory to the cache memory, the control data to be updated or to be modified; moving a clean cache link list to a dirty cache link list so that the dirty cache link list is changed to reflect the update or modification on the control data; and moving the dirty cache link list to a for flush link list and writing an updated control data from the for flush link list to a free flash page in the storage memory.

A system and method for verifying cache coherency in a safety-critical avionics processing environment includes a multi-core processor (MCP) having multiple cores, each core having at least an L1 data cache. The MCP may include a shared L2 cache. The MCP may designate one core as primary and the remainder as secondary. The primary core and secondary cores create valid TLB mappings to a data page in system memory and lock L1 cache lines in their data caches. The primary core locks an L2 cache line in the shared cache and updates its locked L1 cache line. When notified of the update, the secondary cores check the test pattern received from the primary core with the updated test pattern in their own L1 cache lines. If the patterns match, the test passes; the MCP may continue the testing process by updating the primary and secondary statuses of each core.

Methods, systems, and devices for operating a memory device are described. One method includes caching data of a memory cell at a sense amplifier of a row buffer upon performing a first read of the memory cell; determining to perform at least a second read of the memory cell after performing the first read of the memory cell; and reading the data of the memory cell from the sense amplifier for at least the second read of the memory cell.

A method in a multi-core processing system which comprises a processor comprising at least a first and a second processing unit, a cache, common to the first and the second processing unit, comprising a first cache portion associated with the first processing unit and a second cache portion associated with the second processing unit, a memory, comprising a first memory portion associated with the first cache portion and a second memory portion associated with the second cache portion. The method comprises detecting that a data access criteria of the second memory portion is fulfilled, establishing that first data stored in the second memory portion is related to a first application running on the first processing unit, allocating at least a part of the first memory portion to the first application based on cache information, and migrating the first data to the part of first memory portion.

An arithmetic processing device includes arithmetic processing cores, and a control circuit that includes a request port accepting a request for a memory space; a processing circuit unit that executes processing of the request; a control pipeline that determines whether or not the processing is executable by the processing circuit unit on the request input through the request port, and that executes first abort processing for the request when the processing is not executable on the request, and issues the processing to the processing circuit unit when the processing is executable; and an identical-address request arbitration circuit that holds an occurrence order of requests with an identical address that is aborted due to the processing being not executable, and that executes second abort processing on those of requests input to the control pipeline which have the identical address and which are other than a leading request in the occurrence order.

An arithmetic processing apparatus includes a prefetch unit configured to send a prefetch request to a subordinate cache memory for prefetching data of a main storage device into a primary cache memory. The arithmetic processing apparatus further includes a count unit configured to count a hit count of how many times it is detected that prefetch request target data is retained in the subordinate cache memory when executing a response process to respond to the prefetch request sent from the prefetch unit. The arithmetic processing apparatus yet further includes an inhibition unit configured to inhibit the prefetch unit from sending the prefetch request when the counted hit count reaches a threshold value.

A processor includes one or more cores having cache, a cache home agent (CHA), a near memory controller, to near memory, and a far memory controller, which is to: receive a first memory read operation from the CHA directed at a memory address; detect a miss for the first memory address at the near memory; issue a second memory read operation to the far memory controller to retrieve a cache line, having first data, from the memory address of far memory; receive the cache line from the far memory controller in response to the second memory read operation; and send the cache line to the CHA with a forced change to a directory state of the cache line at the CHA, the forced change to cause the CHA to snoop remote sockets to maintain data coherence for the cache line in an absence of directory state in the far memory.

Systems and methods for managing memory access bandwidth include a spatial locality predictor. The spatial locality predictor includes a memory region table with prediction counters associated with memory regions of a memory. When cache lines are evicted from a cache, the sizes of the cache lines which were accessed by a processor are used for updating the prediction counters. Depending on values of the prediction counters, the sizes of cache lines which are likely to be used the processor predicted for the corresponding memory regions. Correspondingly, the memory access bandwidth between the processor and the memory may be reduced to fetch a smaller size data than a full cache line if the size of the cache line likely to be used is predicted to be less than that of the full cache line.

A memory management service occupies a configurable portion of an overall memory system in a disaggregate compute environment. The service provides optimized data organization capabilities over the pool of real memory accessible to the system. The service enables various types of data stores to be implemented in hardware, including at a data structure level. Storage capacity conservation is enabled through the creation and management of high-performance, re-usable data structure implementations across the memory pool, and then using analytics (e.g., multi-tenant similarity and duplicate detection) to determine when data organizations should be used. The service also may re-align memory to different data structures that may be more efficient given data usage and distribution patterns. The service also advantageously manages automated backups efficiently.